Throughout theological history, there’s always been a debate and different extreme positions taken in regards to who can access a direct relationship with Divinity and even if it’s at all possible .
In the teachings of the Vedas, this example is given , that a turtle swimming in the ocean, pops its head up for a breath of air , by chance at that place where the turtle surfaces a log is floating in the ocean , which has hole in it , the turtles head pops directly into that hole , such a rare chance event can be compared to the rarity of the appearance in this world of the top most pure representatives of Divinity .
The great Vedic teacher Srila Bhaktivinod Thakur, says that Sri Caitanya Mahāprabhu , who is considered to be Krishna Himself , is teaching by example, and is the perfect Guru in that sense , Bhaktivinod Thakur also says His direct disciples , Srila Rupa Goswami and Ragganathha das and the other four prominent Goswamis of Vrndavana spoken of by Gaudia Vaisnavas , should all be regarded as our own personal Siksa Gurus , he also says finding topmost Guru is rare , but Mahaprabhu has come to act as perfect Guru , and taught the prominent Devotees particularly Rupa Ragganatha, thus we can take it , that space time , does not get in the way of Divine connections , and full realisation of Mahaprabhu’s teaching are full accessible via Mahaprabhu’s devotees.
The Catholic and Protestants , fight over the direct relationship with Divinity issue , as do the Muslim faith , they also fight over who is the pure representatives , family lines from original teachers or non family lines , from those who have heard and assimilated the wisdom.
Fortunately the Vedas give as the answers, The Guru, Sadhu Sastra truth , are three in one , that also means that each is an authority, but each can be checked against each other .
The other aspects of Spiritual teachers are also clear , Guru comes in many forms , and of different calibers , and each connection is valuable at a given time , but Srila Bhaktisiddanta Sarasvati Goswami says , you should also follow your heart , and its also imperative to take training and render strict services or deeply respect all our Gurus who are present, once that humility has been perfected , the whole of the param para through their litratures come alive , as does the spiritual world and the residents thereof.
So we can never bypass genuine saints or neglect to honour them . By that process, all the saints become accessible and they direct us to Srimati Radharani and Lord Krishna and Their family and associates. One Diksa Guru is generally accepted , but one can have many Siksa Gurus .